Ghair-seat



(No Model.)

' 0. S. FOSTER.

. CHAIR SEAT.

No. 529,485. Patented Nov 20, 1894.

U'i'iwml 1 UNITED STATES PATENT @rrren.

OSCA R S. FOSTER, OF UTICA, NFAV YORK.

CHAIR SEAT.

SPECIFICATION forming part of Letters Patent No. 529,485, dated November20, 1894.

Application filed November 19, 1892. Serial No. 452,4.78. (No model.)

To all whom it may concern:

Be it known that I, OSCAR S. FOSTER, of Utioa, in the county of Oneidaand State of New York, have invented certain new and useful Improvementsin Chair-Seats, &c. and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form part of thisspecification.

My invention relates to an improvement in chair seats and detail ofconstruction relating thereto.

In the drawings which accompany and form a part of this specificationand in which similar letters and figures of reference refer tocorresponding parts in the several views, Figure 1 shows in perspectivea portion of a chair seat frame and a set of upholstery springs securedtherein on suitable supporting slats or straps. Fig. 2 shows the outlineof a chair seat and a set of springs difierently arranged. Fig. 3 showsin detail the end of one of the spring supporthanger. Fig. 4. shows amodified form of the same. Fig. 5 shows in side and end view anotherform of stirrup or hanger. Figs. 6 and 7 show still other modified formsof stirrup or hanger. Fig. 8 shows a pintle spring secured on the springholding strips and securing the strips together at their intersection.Figs. 9 and 10 show details of the spring; Fig. 9 being somewhatdistorted to more fully show the construction.

On the under side of the seat frame 1 is secured by small nails orscrews 2 the ends of the yielding metal spring holding strips 3 and 4,on which are mounted the conical spiral springs 5 and 6. A half strip 9is secured to the seat frame at the front and to the other spring stripsat the point of intersection therewith. There is provided for so curingthe strips, fasteners or hangers 7, which are provided with eyes orslots 7 through which the strips pass, and holes for the reception ofnails by which the fasteners are secured to the inner sides of the seatframe. The portions 00 of the stirrups 7 be low the eyes may be bent tolie flatly on the mg straps in connection with a stirrup or.

under sides of the strips as shown in Figs. 4 and 6. The form offastening or stirrup shown in Fig. 5 is of malleable iron with armsadapted to engage the seat frame, and lips extending each way on theunder side of the strip. According to the form shown in Fig. 6 thefastener is provided with integral spikes or brads; and in Fig. 7 astaple with angular points is used.

The springs, and especially the center springs, are secured on thestrips by being provided with upwardly extending pintle ends 8 whichproject into the center of the circle of the end convolutions of thesprings. In each strip atthe point of intersection, are pro videdopenings which receive the pintle ends and the strips pass between thecontiguous end convolutions of the springs and are gripped by theconvolutions The springs are placed on the strips by passing the stripsbetween the convolutions above the end of the pintle projections, and asthe springs are rotated and screwed on the projections are entered inthe holes in the strips. The strips are gripped together by the springsand the projections 8 passing through holes in each of the strips,secure them from lateral dis placement, and the springs are likewisesecured on the strips and held in vertical position. The half strip 9gives more firmness to the front side of the seat where the greater wearand strain comes, and an extra spring or springs may be mounted on thishalf strip, especially where a larger number of springs than those shownis used in the construction. This arrangement also disposes the springsto better advantage in the front side of the seat which is usually madewider, as

shown. It is evident that these spring holding devices are equallyapplicable to lounges, spring-beds, cots and similar devices.

The spring holding strips being secured by the fasteners at the pointwhere they leave the frame bars, and projecting onto the under side ofthe bars and the pressure on the strips being from the upper side theelasticity of the strips is utilized and the vibra- 'tions of the stripsdo not loosen the strap fastenings.

What I claim as new, and-desire to secure by Letters Patent, is

The combination of a seat frame, intersect ing spring-holding stripsrigidly secured at! to the frame and at the other end to the other eachend? on theunder side of the-fran1e, rigid plate hangers engaging thestrips at the points where they leave the frame-bars 5 and secured onthe inner faces of the framebars, springs having contiguous grippingconvolutions at their ends, and central upwardly extending projectingends adapted to engage in registering holes in the intersect- [0 ingstrips, and a half strip secured at one end strips at the intersection'bythe gripping convolutions of the central spring and its central end,substantially as set forth.

In witness whereof I have affixed my signature in presence of twowitneses.

OSCAR S. FOSTER.

Witnesses:

GEORGE O. CARTER, M. A. KELLER.

